Strickle for card-clothing.



no. masas.

Patented November 22, i90/1t.

PATENT OEEICE.

HORATIO L. MILLER, OF WORCESTER, MASSACHUSETTS.

STRICKLE FOR CARD-CLOTHING..

SPECIFICATION forming part of Letters Patent No. 775,842, dated November 22, 1904. Application filed July 2, 1904. Serial No. 215,118. (No model.)

To all whom it may concern:

Be it known that I, HoEA'rIo L. MILLER, a citizen of the United States, residing at idrorcester, in the county of Worcester and Commonweath of Massachusetts, have invented anew and useful Improvement in a Strickle 'for Card-Clothing, of which the following is a specification, accompanied by drawings forming' a part of the same, in which- Figure l represents a front or face view of my improved strickle. Fig. 2 is a side view. Fig. 3 is a rear View of the abrading-plate. Fig. t is an end view, and Figs. 5 and 6 are diagrammatic views illustrating the action of the abrading-plate upon the teeth of the cardclothing.

Similar reference-figures refer to similar parts in the different views.

The object of my present invention is to provide a strickle by which the teeth of cardclothing carried upon a rotating cylinder may be uniformly and accurately ground, so as to produce a pointed tooth, and by which the bur necessarily formed upon the end of the teeth when the same are ground by the action of a grindingdrum will be removed.

The strickle embodying' my present inve-ntion belongs to that class which comprises a corrugated or ribbed abrading-plate adapted to beheld in the path of the card-teeth as they are carried upon the surface of a revolving cylinder. Strickles of this class have heretofore been known in which the abrading-plate was provided with a series'of triangular ribs and intermediate triangular grooves running parallel to each other and parallel with the plane of rotation of the revolving card-clothed cylinder, but in strickles of this character the abrading-plate requires to be removed longitudinally along the card-clothed cylinder or in a line parallel with the axis of the cylinder. The longitudinal movement of the strickle in a line parallelwith the axis of the revolving' cylinder was for the purpose 0f bring opposite sides of the card-tooth alternately against the sides of the triangular ribs, so as to produce a pointed tooth, the movement of the strickle in one direction grinding one side of the tooth and the movement of the strickle in the opposite direction grinding the opposite side of the tooth. The amount of grinding upon each side of the tooth by this method was detern'iined by two factors-li rst, the length of time the strickle was being moved in each direction, which determined the period of time each side of the tooth was being ground, and, second, the rapidity with which the strickle was moved which determined the pressure of the abrading-rib against the side of the tooth. It is difhcult to maintain these two factors uniform and the operation of grinding a cylinder with astrickle of this class requires considerable skill in the manipulation of the ribbed abrading-plate.

lt is one of the objects of my invention to obviate the necessity of longitiidinally moving the strickle across the surface of the card-clothed cylinder, and I accomplish this object by means of a strickle constructed as hereinafter described, the novel features bcing pointed out in the annexed claims.

Referring tothe accompanying' drawings, 1

denotes a holding-block, preferably of wood, having its upper and lower edges concaved, as at 2 2, to enable the block to be more readily held by the operator. One side of the block is provided with longitudinal grooves 3 3, which are slightly undercut or dovetailed, and to the grooved side of the block i apply an abrading-plate 4:, preferably made of any suitable compound. containing ground emery and molded into the desired form of the plate. A convenient method of constructing the abrading-plate is to form it of some vulcanizable material containing' ground emcry, there by enabling' it to be molded in a semiplastic state and afterward vulcanized. The abrading-plate 4 consists of a plate of substantially the same area as one side of the holding-block l, provided on its back or rear side with longitudinal ribs 5, litting the longitudinal grooves 3 of the holding-block- Upon the face of the abrading-plate fi l form a series of ribs 6, extending transversely across the face of the abrading-plate i with intervening 9 grooves 7. rl`he ribs 6 are preferably triangular in cross-section and are separated by corresponding triangular grooves. Jinstead of extending straight across the face of the plate 4c the ribs (3 cross the plate transversely and IOO in a serpentine line, as represented in Fig. 1, so that when the strickle is supported upon any convenient rest and held stationary in a position to receive the points of the teeth of the card-clothing in the triangular groove 7 each tooth in passing across the plate 4 will be deflected to the right and to the leftby the curvature of the groove. The deflection of the card-tooth is illustrated in the diagrammatic views Figs. 5 and 6, Fig. 5 showing a card-tooth 8 deflected toward the right, so as to bring the side of the tooth against the inclined side 9 of one of the abrading-ribs 6.

In Fig. 6 the card-tooth 8 is represented as being deflected toward the left, and as being ground upon the opposite side of the point by the inclined side l0 of the abrading-rib 6. My improved strickle is held stationary while the card-clothed cylinder revolves, with the serpentine ribs held in the path of the revolving card-teeth, while the latter are being carried around by the cylinder in a curved path l1, Fig. 4, and in the direction of the arrow 12. By the use of my improved strickle the deflection of the card-tooth is caused by the curvature of the ribs 6, and the amount of pressure of the side of the tooth against the abrading-rib is determined by the velocity of the card-clothed cylinder, and as these are both fixed factors the resulting grinding of the tooth is rendered uniform. I strengthen the abrading-plate 4C by forming upon the rear side two longitudinal integral ribs 5 5, prefernbly placed about midway between the cen-` ter of the plate and its outer edges, and I utilize these ribs for attaching the abradingplate to the holding-block l by inserting them lengthwise into the undercut or dovetailed grooves 3.

What I claim as my invention, and desire to secure by Letters Patent, is

l. As an article of manufacture, a strickle l for card-clothing comprising lan abradingplate having a flat surface provided with a series of curved ribs extending transverselyr across the fiat surface of said plate.

2. As an article of manufacture, a strickle for card-clothing consisting of a block adapted to be held by hand, an abrading-plate having aflat side, serpentine ribs extending transversely across the flat side of said abradingplate and means for attaching said block and plate.

3. As an article of manufacture a strickle for card-clothing comprising an abradingplate having a flat side provided with a series of ribs triangular in cross-section and extending in curved lines across the fiat side of said abrading-plate.

4. A strickle for a card-cylinder consisting of a grooved holding-block, an abrading-plate provided with a longitudinal rib adapted to enter the groove in said block, and a series of curved ribs on the exposed face of said plate.

5 Astrickle for a card-cylinder consisting of a holding-block having concaved edges and a longitudinal groove on one of its sides, an abrading-plate having a longitudinal rib entering said groove and a series of curved ribs on its exposed face.

HORATIO L. MILLER.

Witnesses:

PENELorn GOMBERBAGH, l RUFUs B. FowLER. 

